The backplate's passive-infrared motion sensors (near and far).
:motion events fire when the level reaches the threshold or either sensor
flags a detection. Someone walking in is seen from about 4 m.
Summary
Functions
Latest motion level, 0 (nothing moving) to about 10.
Level from which movement counts as motion (default 2).
Functions
@spec level() :: non_neg_integer()
Latest motion level, 0 (nothing moving) to about 10.
@spec set_threshold(pos_integer()) :: :ok
Level from which movement counts as motion (default 2).